Question

Triangle ABC is shown below.

Answer 1

Given: ΔABC
Prove: All three angles of ΔABC add up to 180°.
The flow chart with missing reason proves the measures of the interior angles of ΔABC total 180°.

Answer 2

Which reason can be used to fill in the numbered blank space?

Answer 3

Select one:
a. Definition of Supplementary Angles
b. Substitution
c. Definition of Complementary Angles
d. Angle Addition Postulate

Answer 4

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Answer 5

such that DE is parallel to AC

Answer 6

1+4+3=180

Answer 7

so wat do I do now

Answer 8

is it D